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and the sliding tube.
A spare seal activating valve can isolate the bottom
gland seals if a leak occurs.
TMULDAI09-T02 LEVEL 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
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MAIN LANDING GEAR DESCRIPTION - MAIN FITTING
(TOP CHARGING VALVE ASSEMBLY - SPARE SEAL ACTIVATING VALVE)
TMULDAI09-P02 LEVEL 2
EFFECTIVITY 32-11-00 Page 5
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LANDING GEAR AND DOORS - MAIN LANDING GEAR DESCRIPTION
SLIDING TUBE/AXLE
The sliding tube moves in the main fitting and is a
primary component of the shock absorber.
The axle and the sliding tube are part of same assembly.
The second stage inflation valve of the shock absorber
is on the sliding tube.
TMULDAI09-T03 LEVEL 2
EFFECTIVITY 32-11-00 Page 6
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 32 LANDING GEAR
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MAIN LANDING GEAR DESCRIPTION - SLIDING TUBE/AXLE
TMULDAI09-P03 LEVEL 2
EFFECTIVITY 32-11-00 Page 7
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LANDING GEAR AND DOORS - MAIN LANDING GEAR DESCRIPTION
ACTUATING CYLINDER
The MLG actuating cylinder is installed on the main
fitting at the piston rod end. Two lugs attach the
body to the wing rear spar.
When it is hydraulically supplied:
- the piston rod extends to retract the MLG,
- the piston rod retracts to extend the MLG.
SIDE STAY ASSEMBLY
The main components of the side stay assembly are:
- a basic side stay,
- a lock stay,
- a lock stay actuator,
- two lock springs,
- the proximity sensors and their related
targets.
The lock springs move the lock stay to an overcenter
position during the extension cycle.
LOCK STAY
The lock stay provides an overcenter stop and a
geometric lock of the landing gear.
LOCK STAY ACTUATOR
During MLG extension the two lock stay actuator ports
are open to return; a restritor controls the rate of
MLG extension.
It is pressurized to extend during MLG door closure
until hydraulic pressure on the door close line is
released.
During MLG retraction, the hydraulic fluid retracts
the piston which opens the overcentered lock, to fold
the side stay and the lock stay against the lock
springs.
TORQUE LINKS/SLAVE LINK
The torque links align the main fitting and the sliding
tube, but let vertical movement between the parts
occur.
The slave link is mounted at the rear.
TORQUE LINK DAMPER
The torque link damper is a spring centered, two way
hydraulic unit, which has its own hydraulic reservoir.
Its function is to decrease the landing vibrations
through the torque links.
TMULDAI09-T04 LEVEL 2
EFFECTIVITY 32-11-00 Page 8
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TMULDAI09-P04 LEVEL 2
MAIN LANDING GEAR DESCRIPTION - ACTUATING CYLINDER - SIDE STAY ASSEMBLY - LOCK STAY
LOCK STAY ACTUATOR - TORQUE LINKS/SLAVE LINK - TORQUE LINK DAMPER
EFFECTIVITY 32-11-00 Page 9
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THIS PAGE INTENTIONALLY LEFT BLANK
TMULDAI09 LEVEL 2
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32 - LANDING GEAR
32-12-00 LANDING GEAR AND DOORS - MAIN
LANDING GEAR DOORS DESCRIPTION
CONTENTS:
General
Main Door
Main Landing Gear Door Uplock
Hinged Fairing
Fixed Fairing
TMULDCI03 LEVEL 2
EFFECTIVITY 32-12-00 Page 1
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LANDING GEAR AND DOORS - MAIN LANDING GEAR DOORS DESCRIPTION
GENERAL
Each main landing gear is enclosed by one door and two
fairings:
- one main door,
- one hinged fairing,
- one fixed fairing.
　
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